Rotary pump.



H. A. WEIDENBACH.

ROTARY PUMP.

APPLICATION FILED MIG-22. Hill- I Patented Oct-1,1918.

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To all whom it may concern:

' HERMAN A. WEIIDENBAOH, OF BUFFALO, NEW YORK.

ROTARY PUHI Be it known that I, HERMAN A. WEIDEN- men, a citizen of the United States of America, and a resident of the city of Buffalo, county of Erie, and State of New York, have invented certain new and useful Improvements in Rotar Pumps, of which the following is a full, c ear, and exact descrip-. tion.

I have sought to provide a rotary pump which shall be eflicient in' its operation, and

one which shall produce a plurality of pump impulses every revolution, thereby giving a Isiulgeltantially constant and uniform flow of Another objecthas been to provide a pump which shall be cheap to manufacture' and simple in its construction and operation.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings.

In the drawings:

Figure 1 is a transverse, sectional elevation taken on line 1 -1 of F 2.

Fig. 2 is a longitudinal, sectlonal elevation taken on line 22 of Fig. 1.

Fig. 3 is a fragmentary, sectional view taken on line 33 of Fig. 1.

The pump comprises in general, an outer casing 5; a rotor 6; and easing heads 7 and- 8, secured one to each end of the casing.

The casing 5 is provided with a cylindrical bore 9 and with end flanges 10 and 10. Formed in the casing are a plurality of inlet chambers 11, and a plurality of discharge chambers 12. The inlet chambers 11 extend from the left hand side of the casing, as viewed in Fig. 3, to the opposite side of the casing, where they open into the face of the flange 10. 'kthe discharge chambers extend from the righ hand side of the easing (see Fig. 1) to the opposite. side thereof, where they open into the face of the flange 10 Connecting each of the inlet chambers 11 with the interior of the casing is an inlet port 13-; connecting each of the discharge chambers with the interior of the casing is a discharge port14.

The casing head 8, which is secured to the flange 10'of the cylinder, is provided with an annular, inlet manifold '15. This manifold is connected with the inlet chambers 11 by means of manifold inlet ports 16, arranged ones opposite each of the inlet chambers. The casing head '1, which is secured to the flange 10, is provided with an Specification of Letters Patent.

' shown.

Patented Oct. 1, 1918.

Application filed August 22, 1917. Serial No. 187,511.

annular discharge manifold 17, and connectmg th1s manifold with each of the discharge 18. The inlet manifold 15 is provided with. a boss 19 to which is screwthreaded a suct1on or inlet ipe 20. The discharge maniwhich is screwthreaded a discharge or outlet pipe 22.

Arranged between the inlet chambers 11 and discharge chambers 12 and their connected ports are radially sliding valves 23, 24, and 25, whereby these chambers and ports are separated. These valves are yieldably held in contact with the rotor by any suitable means,'but preferably by the means These means comprise a cylinder 26, screwthreaded into the casing in line with the top edge of each of the valves.

chambers 12 is a manifold discharge portfold is likewise provided with a boss 21 to i Within the cylinder is slidably mounted a plunger 2'7,- having a peripherally reduced lower end which contacts with the upper edge of the valve. A helical spring 28 is arranged within the cylinder and provides the necessary pressure to the plunger. The

' valves 23, 24, and 25 slide within grooves cut into the casing5, and a port 29 extends outwardly from each of the discharge chamthe valves, act as additions to or continuations of the inlet and discharge chambers. The rotor is. rigidly secured to a shaft 34, which is rotatably mounted in suitable bearin%%, hcarried by the heads 7 and 8.

en the pump is put in operation and rotated in the direction of the arrow in Fig. 1 there will occur a number of successive pump impulses. A description of one of them will give a clear understanding of each of the others, and so, for convenience, I will describe the impulse of but one piston chamber. Thus it will be seen that the fluid will be-drawn from the inlet chamber 11, at the right hand side of the valve 23, through the port 13, and into the piston chamber at the right of the valve 23. Thischamber is, of

course,.inereasing in volume as the rotor continues to rotate,*and', when its left hand edge has passed the valve 23, the fluid contained within this piston chamber will be transferred to the next'succceding discharge chamber 12, and, as the piston chamber contacts with the valve 24, the fluid contained therein will be forced through the discharge port 14 and into the discharge chamber 12. It will be clear that while the fluid is being discharged through the port 14, the part of the chamber on the other side of the valve is drawing in a charge of fluid from the inlet -ehamber 11, through the inlet port 13. Each time any one of the piston chambers passes a valve, a charge of fluid is being discharged and drawn in.

In the drawings I have shown but three valves and a corresponding number of inlet and discharge ports. I have also shown four piston chambers provided in the periphery of the rotor. By making the piston chambers of the rotor different in number from the number of valves, I get a number of successive pump impulses from each revolution of the rotor, which give a substantially uniform and constantflow of fluid.

While I have shown and described the number of valves, inlet chambers, discharge chambers, and piston chambers above noted, it will be obvious that I may provide any desired number of these parts and ports. These and other modifications may be made without departing from the spirit of my invention or the scope of the appended claims; and I do not, therefore, wish to be limited to the exact embodiment herein shown and described.

Having thus described my invention, What I claim is:

1. A rotary pump comprising a casing and a rotor, the casing being provided with a plurality of inlet chambers, a plurality of discharge chambers, a plurality of inlet ports and a plurality of discharge ports, the rotor being provided with a plurality of pis ton chambers, in combination with radially reciprocating valves carried by the casing and engageable with the walls of the piston chambers of the rotor.

2. A rotary pump comprising a casing and a rotor, the casing being provided wlth a plurality of inlet chambers, a plurality of' and engageable with the walls of the piston chambers of the rotor, whereby a series of successive pump impulses are produced for ton chambers, in combination with radially reciprocating valves carried by the casing and engageable with the walls of the piston chambers of the rotor, and means for keeping the valves in contact with the periphery ofthe rotor.

4. A rotary mmp comprising a casing and a rotor, the casing being provided with a pluralitv of inlet chambers, extending from one side of the casing to the opposite side thereof where they open into its under face. a plurality of discharge chambers, arranged reversely of the inlet chambers and extending from one side of the casing to the opposite side thereof, where they open into its under surface. a plurality of inlet ports. and a plurality of discharge ports, said rotor being provided with a plurality of piston chambers, in combination with radially reciprocating valves carried by the casing and engageable with the walls of the piston chambers of the rotor.

5. A rotary pump comprising a casing and a rotor, the casing being provided with a plurality of inlet chambers, extending from one side of the casing to the opposite side thereof where they open into its under face. a plurality of discharge chambers, arranged reversely of the inlet chambers and extending from one side of the casing to the opposite side thereof where they open into its under surface, a plurality of inlet ports, and a plurality of discharge ports, said rotor being provided with a plurality of piston chambers, in combination with casing heads arranged at each end of the casing, one casing head being provided with an inlet manifold and inlet manifold ports connecting the manifold with the inlet chambers, theother casing head being provided with a discharge manifold and discharge manifold ports connecting the manifold with the discharge chambers, and radially reciprocating valves carried by the casing and engageable with the walls of the piston chambers of the rotor.

In testimony whereof I have hereunto signed my name.

HERMAN A. IVEIDENBACH. 

